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Paper Abstract and Keywords
Presentation 2024-10-17 12:50
[Poster Presentation] Fundamental Study on the Influence of Terrain Shielding the Fresnel Zone on 920 MHz Band Radio Propagation in Mountainous Areas
Atsushi Ikaruga, Makoto Kobayashi, Koichi Shin, Masahiro Nishi (Hiroshima City Univ.) AP2024-94
Abstract (in Japanese) (See Japanese page) 
(in English) Many landslides have occurred due to heavy rains and typhoons, causing extensive damage.
In addition, many human casualties have occurred due to delays in evacuation.
Early evacuation of residents is essential to prevent human casualties.
A sensor network that transmits information sensed in mountainous areas to base stations in residential areas using 920 MHz radio waves is being studied.
In this study, we investigated the effect of terrain shielding the Fresnel zone in mountainous areas on 920 MHz band radio propagation by transmitting radio waves from the mountainous areas and measuring propagation loss at two receivers located on the Hiroshima City University campus.
The propagation loss of the 920 MHz band radio wave from mountainous areas was calculated, and the characteristics of the propagation loss were evaluated considering the topography and Fresnel zone between the transmitter and receiver.
The measurement results show an increase in propagation loss when terrain is included within a zone less than 0.6 times the first Fresnel radius on the propagation path, compared to when no terrain is included within it.
The propagation loss was also increased due to the influence of the topography and vegetation around the measurement location.
In particular, a difference of about 20~dB in propagation loss due to the topography and vegetation was observed near the mountain ridge.
Keyword (in Japanese) (See Japanese page) 
(in English) Mountainous areas / Fresnel zone / Terrain / 920 MHz band radio wave / Propagation characteristics / / /  
Reference Info. IEICE Tech. Rep., vol. 124, no. 206, AP2024-94, pp. 104-104, Oct. 2024.
Paper # AP2024-94 
Date of Issue 2024-10-09 (AP) 
ISSN Online edition: ISSN 2432-6380
Copyright
and
reproduction		 All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034)
Download PDF AP2024-94

Conference Information
Committee AP  
Conference Date 2024-10-16 - 2024-10-18 
Place (in Japanese) (See Japanese page) 
Place (in English) ACROS Fukuoka 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Student Session, Antennas and Propagation 
Paper Information
Registration To AP 
Conference Code 2024-10-AP 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Fundamental Study on the Influence of Terrain Shielding the Fresnel Zone on 920 MHz Band Radio Propagation in Mountainous Areas 
Sub Title (in English)  
Keyword(1) Mountainous areas  
Keyword(2) Fresnel zone  
Keyword(3) Terrain  
Keyword(4) 920 MHz band radio wave  
Keyword(5) Propagation characteristics  
Keyword(6)  
Keyword(7)  
Keyword(8)  
1st Author's Name Atsushi Ikaruga  
1st Author's Affiliation Hiroshima City University (Hiroshima City Univ.)
2nd Author's Name Makoto Kobayashi  
2nd Author's Affiliation Hiroshima City University (Hiroshima City Univ.)
3rd Author's Name Koichi Shin  
3rd Author's Affiliation Hiroshima City University (Hiroshima City Univ.)
4th Author's Name Masahiro Nishi  
4th Author's Affiliation Hiroshima City University (Hiroshima City Univ.)
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Speaker Author-1 
Date Time 2024-10-17 12:50:00 
Presentation Time 110 minutes 
Registration for AP 
Paper # AP2024-94 
Volume (vol) vol.124 
Number (no) no.206 
Page p.104 
#Pages 1 
Date of Issue 2024-10-09 (AP) 

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